Membrane-pump.



V. F. MO'LLER; MEMBRANE PUMP. APPLICATION FILED mmzo. 1916.

Patented Aug. 14,1917.

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VALDEMAR FB'EDERIK MLLEIR, OF SVENDBORG, DENMARK, ASSIGNOR T0 A/S CARL AXELSENS JERNSTOBERI & MASKINFABRIK, 0F SVENDBORG, DENMARK, A FIRM.

MEMBRANE-PUMP.

Patented Aug. ME, 1917.

Application filed March 20, 1916. Serial No. 85,438.

To all whom it may concern: 7

Be it known that VALDEMAR FREDERIK Mgzfinnnr, director, subject of the Kingdom of Denmark, residing at the city of Svendborg, in Denmark, has invented certain new and useful Improvements in Membrane-Pumps, of which the following is a specification.

Membrane-pumps as hitherto constructed act as suctionand lift-pumps, which per form the suction andthe lift of the liquid by the same stroke so that the power necessary for performing the alternate strokes is very different, as it is relatively great for the actuating stroke and inconsiderable for the reverse stroke, To actuate such a pump by means of a rocking-bar and two men, one at each end of the bar, would therefore be meaningless, as nearly all of the work would come to the one man, while the other properly speaking would be of no use.

The invention has for its object to improve the membrane-pump in such a manner that it can be actuated by two men, of which one performs the suction-stroke, the other the pressure-stroke, and in such a manner that the power for performing the alternate strokes is nearly equal. To this end the improved membrane-pump is constructed in such a manner that it does not act as a suctionand lift-pump as hitherto, but as a suctionand pressure-pump which performs alternately suctionand pressurestrokes. This mode of operation is an entirely new feature of pumps of said kind and is therefore the most characteristic feature by the invention.

A constructural form of the invention is illustrated in the drawings in which Figure 1 is a side view of the pump, partially in section, and

Fig. 2 is an end view of the pump, seen in the direction of the arrow A, Fig. 1.

The membrane-pump is supported by a foot a provided with an elbow-pipe Z) connected to the suction-pipe 0. The pumpchamber d may be bolted to the foot a. Said pump-chamber has the shape of a Vessel the bottom of which is provided with an opening corresponding to the diameter of the elbow-pipe Z) and controlled by a suction-valve f, which only opens upwardly, into the interior of the chamber cl. The outer edge of the menbrane h is fixed between the ring shaped upper edge of the chambers d and a ring 9 bolted to said edge, The

membrane is ring shaped and its inner edge is fixed between the lower edge of the pumpbody 2' and the valve-seat j of the pressure valve 70, which valve-seat is mounted in the pump-body. Said latter has the shape of a vessel, in the bottom of which. the pressurevalve is arranged. The pump-body is provided with a dome shaped cover m or may be integral therewith, terminating in a pipe shaped extension n to which is fixed a nozzle 0. The pump-body is suspended on a pin 7) carried by a knee 9, one end of which by means of a bolt 7" is connected to the end of a pump-lever t pivoted at 8. Normally the edge u of the pump body rests on the upper edge of the ring g. The knee g is provided with holes 0, into which hand-spikes (not shown) for the two men operating the pump are inserted.

The operation of the pump is as follows:

If the pumplever t is moved to the right from the position shown in Fig. 1 (by actuating the right handspike) the bolt 1" will move in a bow to the right and downward thereby causing the knee g to turn on the bolt 7 and to lift the pin p vertically so that the pump-body 2 and the parts fixed to it are moved vertically upward. During its vertical up and down strokes the pump-body is guided by guides 2 situated within the ring 9. The upward movement is limited by an extension '0 of the knee 9, which meets an extension to of the pump-lever and prevents further movement of the knee 9. During the up-stroke (suction stroke) of the pump-body the pressure valve is is closed, while the suction-valve f opens and allows liquid to enter the pump-chamber d. The inner edge of the membrane h is lifted with the pump-body. l/Vhen the suction-stroke is performed the pump-lever t is returned to the position shown in Fig. 1 (by actuating the left handspike), and of course the pumpbody is moved downward, until its edge u meets the upper edge of the ring 9. During lilii cases the ,e ifect to be produced is only re- 11o spectively suction and pressure, and of course the work will be equally distributed between the two men, which actuate the hand-spikes. The work to be done on each of the strokes is nearly equal because pumps of this kind are used only in cases where the suction and discharge heads are practically equal.

Claims:

1. A membrane-pump, characterized by the combination of a stationary vesselshaped pump-chamber, a suction pipe, and a suction valve forming communication between said pump-chamber and said suctionpipe, with a ring shaped membrane fixed within said pump-chamber, a pressurevalve arranged in the central opening of said membrane, a hollow pump-body projecting into and guided within said pumpchamber, a seat for said pressure-valve fixed to said membrane and to said pump-body, means for moving vertically up and down said pump-body, and a pressure-pipe (nozzle) communicating with the interior of said pump-body; substantially as described and illustrated and for the purpose stated.

2. A membrane-pump, characterized by the combination of a stationary vesselshaped pump-chamber, a suction pipe, and a suction-valve forming communication between said pump-chamber and said suctionpipe, with a ring shaped membrane fixed within said pump-chamber, a pressure-valve arranged in the central opening of said membrane, a hollow pump-body projecting into and guided within said pump-chamber and provided with a nozzle, a seat for said pressure-valve fixed to said membrane and to said pump-body, a knee provided with a pin on which saidpump-body is suspended, means for rocking said knee, and a pumplever, which turns about a fixed pivot and having its end pivotally connected to one end of said knee; substantially as described and illustrated and for the purpose stated.

3. A membrane pump, characterized by the combination of a stationary vesselshaped pump-chamber, a suction-pipe, and a suction-valve forming communication between said pump-chamber and said suctionpipe, with a ring shaped membrane fixed within said pump-chamber, a pressure-valve arranged in the central opening of said membrane, a hollow pump-body projecting into and guided within-said pump-chamber and having a nozzle,a seat for said pressurevalve fixed to said membrane and to said pump body, a knee provided with a pin, on which said pump-body is si'ispended, means for rocking said knee, a pump-lever turning about a fixed pivot and having itsend pivotally connected to oneend of said knee, and extensions (stops) onsaid knee and said pump-lever; substantially as described and illustrated and for the purpose stated.

4. A membrane-pump, characterized by the combination of apump-foot, a stationary vessel-shaped pump-chamber bolted or screwed to said pump-foot, a suction pipe, and a suction-valve forming communication between said pump-chamber and said suction-pipe, with a ring shaped membrane, the outer edge of which is fixed to said pump-chamber, a pressure-valve arranged in the central opening of said membrane, a hollow pump'body projecting into and guided within said pump-chamber and hav ing a nozzle, a seat for said pressure-valve fixed to said membrane and to said pump body, and means for moving up and down said pump-body; substantially as described and illustrated and for the purpose stated.

In testimony whereof I aflix my signature VALDEMAR FREDERIK' MQiLLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. O. 

